Low-load pathogen spillover predicts shifts in skin microbiome and survival of a terrestrial-breeding amphibian.
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Authors
Becker, C GuilhermeBletz, Molly C
Greenspan, Sasha E
Rodriguez, David
Lambertini, Carolina
Jenkinson, Thomas S
Guimarães, Paulo R
Assis, Ana Paula A
Geffers, Robert
Jarek, Michael
Toledo, Luís Felipe
Vences, Miguel
Haddad, Célio F B
Issue Date
2019-08-14
Metadata
Show full item recordAbstract
Wildlife disease dynamics are strongly influenced by the structure of host communities and their symbiotic microbiota. Conspicuous amphibian declines associated with the waterborne fungal pathogen Batrachochytrium dendrobatidis (Bd) have been observed in aquatic-breeding frogs globally. However, less attention has been given to cryptic terrestrial-breeding amphibians that have also been declining in tropical regions. By experimentally manipulating multiple tropical amphibian assemblages harbouring natural microbial communities, we tested whether Bd spillover from naturally infected aquatic-breeding frogs could lead to Bd amplification and mortality in our focal terrestrial-breeding host: the pumpkin toadlet Brachycephalus pitanga. We also tested whether the strength of spillover could vary depending on skin bacterial transmission within host assemblages. Terrestrial-breeding toadlets acquired lethal spillover infections from neighbouring aquatic hosts and experienced dramatic but generally non-protective shifts in skin bacterial composition primarily attributable to their Bd infections. By contrast, aquatic-breeding amphibians maintained mild Bd infections and higher survival, with shifts in bacterial microbiomes that were unrelated to Bd infections. Our results indicate that Bd spillover from even mildly infected aquatic-breeding hosts may lead to dysbiosis and mortality in terrestrial-breeding species, underscoring the need to further investigate recent population declines of terrestrial-breeding amphibians in the tropics.Citation
Proc Biol Sci. 2019;286(1908):20191114. doi:10.1098/rspb.2019.1114.Affiliation
HZI,Helmholtz-Zentrum für Infektionsforschung GmbH, Inhoffenstr. 7,38124 Braunschweig, Germany.Publisher
Royal Society of LondonJournal
Proceedings. Biological sciencesPubMed ID
31409249Type
ArticleOther
Language
enEISSN
1471-2954ae974a485f413a2113503eed53cd6c53
10.1098/rspb.2019.1114
Scopus Count
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- Creative Commons
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 4.0 International
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